.app{
    width: 80%;
    margin: 0 auto;
    padding: 15px 0;
}
.title{
    height: 10%;
    width: 100%;
    font-size: 23px;
    font-weight: bold;
    padding: 0 10px;
    color: #555;
}
.books{
    width: 100%;
    height: auto;
    display: flex;
    justify-content: space-between;
    flex-wrap: wrap;
    margin-top: 20px;
}
.book_item{
    width: 25%;
    height: auto;
    margin-bottom: 10px;
    display: flex;
    justify-content: space-between;
}
.book_img{
    width: 49%;
    height: auto;
    overflow: hidden;
    border-radius: 8px;
}
.book_img img{
    width: 100%;
    height: auto;
    transition: all 0.25s;
}
.book_img img:hover{
    transform: scale(1.07);
}
.book_info{
    width: 45%;
    height: auto;
    padding: 10px 10px 10px 0;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    color: #555;
}
.author{
    font-size: 12px;
    color: #999;
}
.subname{
    color: #777;
    height: 45px;
    width: 100%;
    overflow: hidden;
    text-overflow: ellipsis;
}
.subname:hover{
    color: #e60000;
    cursor: pointer;
}
.name:hover{
    color: #e60000;
    cursor: pointer;
}
.author span:hover{
    color: #e60000;
    cursor: pointer;
}